在spring 3.2中,新增了@ControllerAdvice,@RestControllerAdvice 注解,可以用于定义@ExceptionHandler、@InitBinder、@ModelAttribute,并应用到所有@RequestMapping中。参考帮助文档。@RestControllerAdvice 是组件注解,他使得其实现类能够被classpath扫描自动发现,如果应用是通过MVC命令空间或MVC Java编程方式配置,那么该特性默认是自动开启的。
主要配合@ExceptionHandler使用,统一处理异常情况。下面的ResponseEntity、ResponseData 都是项目自定义的返回对象。
import lombok.extern.slf4j.Slf4j; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RestControllerAdvice; import org.springframework.web.servlet.NoHandlerFoundException;@Slf4j @RestControllerAdvice public class GlobalExceptionHandler {/*** 处理运行异常*/@ExceptionHandler(RuntimeException.class)public ResponseEntity<String> handleRuntimeException(RuntimeException ex) {log.error("", ex);return new ResponseEntity<>(ex.getMessage(), HttpStatus.BAD_REQUEST);}/*** 用来捕获404,400这种无法到达controller的错误** @param ex* @return* @throws Exception*/@ExceptionHandler(value = Exception.class)public ResponseData defaultErrorHandler(Exception ex) throws Exception {log.error("", ex);ResponseData<Object> result = new ResponseData<Object>();result.setMessage(ex.getMessage());if (ex instanceof NoHandlerFoundException) {result.setCode("404");} else {result.setCode("500");}result.setData(null);result.setSuccess(false);return result;} }